Breaks a CSV into parts, but keeps those things in quotes (single OR double), or in curved bracket together.

preg_match_all('~(?:\'[^\'\\\\]*(?:\\\\.[^\'\\\\]*)*\'|"[^"\\\\]*(?:\\\\.[^"\\\\]*)*"|(\((?:[^()]++|(?1))*\))|[^\'",])+~s', $text, $matches)